25266673919 has 2 divisors, whose sum is σ = 25266673920. Its totient is φ = 25266673918.

The previous prime is 25266673891. The next prime is 25266673931. The reversal of 25266673919 is 91937666252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25266673919 is a prime.

It is a super-2 number, since 2×25266673919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25266673219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12633336959 + 12633336960.

It is an arithmetic number, because the mean of its divisors is an integer number (12633336960).

Almost surely, 2^25266673919 is an apocalyptic number.

25266673919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25266673919 is an equidigital number, since it uses as much as digits as its factorization.

25266673919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 56.

The spelling of 25266673919 in words is "twenty-five billion, two hundred sixty-six million, six hundred seventy-three thousand, nine hundred nineteen".